Dispatching a sundial to Mars - Bill Nye

View full lesson: http://ed.ted.com/lessons/sending-a-sundial-to-mars-bill-nye Bill Nye, otherwise known as The Science Guy, inherited his father's fascination with sundials. And so he campaigned to have sundials aboard the Spirit and Opportunity Mars exploration rovers. A look at how a small device reveals big implications as to our place in space. Learn more about your ad choices. Visit megaphone.fm/adchoices